Yamaha C60 convert to C70

Discussion in 'Outboard Maintenance' started by TomFL, Jul 8, 2009.

  1. TomFL

    TomFL Well-Known Member

    Just picked up a boat with a Yamaha C60 outboard on it. Standard 3 cyl, 849 cc, 218lbs.

    Yamaha also makes a 70 which is identical to this motor except the 70 has oil injection.

    Naturally I'd like to look into converting this motor to a 70 if it's something simple and relatively inexpensive.

    My question is, have those of you that have done a similiar conversion had any issues down the road that made you wish you hadn't done it?

  2. Brett

    Brett > PRO STAFF <

    Carb and intake assemblies are different


  3. TomFL

    TomFL Well-Known Member

    Looks like they have a larger carb and intake, yes. Also you gotta watch as they have a "precision-blend" version of the 70 as well.

    I would think it can be done if I found the parts (parts for these motors should be readily available on the market), but I'm also wondering if anyone had any regrets once they changed over.
  4. Flyline

    Flyline Won &quot;Do More With Less&quot; Award!

    I love converting the small portable outboard motors but for C60hp yami 2-stroke....I just leave the way it is.

    What's 10 more hp gotta do for the boat? I will invest a better propeller or else.

    If 60 - 90hp then I will do it.

    My 2 cents.

    Good luck :)